from The Meteoritical Bulletin, No. 111
Northwest Africa 15373 (NWA 15373)
Lunar meteorite (fragmental breccia)
History: Mark Lyon purchased this meteorite from a Moroccan meteorite dealer in 2022.
Physical Characteristics: Many identically appearing pieces totaling 45 kg found together. The largest individual piece is 2.6 kg. Dark colored, irregular exterior lacking fusion crust. Saw-cut surface reveals a fragmental breccia with light and dark colored clasts set in a dark-gray groundmass.
Petrography: (C. Agee and A. Ross, UNM) Reflected light microscopy and electron microprobe analysis confirms a lunar fragmental breccia with lithic clasts, mineral clasts, and shock melt. Major phases are plagioclase, pigeonite, augite, and olivine. Minor phases include low-Ni iron metal, ilmenite, troilite, chromite, silica and Ti-Cr spinel.
Geochemistry: (A. Ross, UNM) Plagioclase An96.5±0.5Ab3.3±0.5, n=5; pigeonite Fs25.7±6.1Wo5.1±3.0, Fe/Mn=55±6, n=5; augite Fs16.0±2.3Wo36.5±3.4, Fe/Mn=45±4, n=4; olivine Fa28.3±5.4, Fe/Mn=95±11, n=10.
Classification: Lunar fragmental breccia.
Specimens: 20.4 g on deposit at UNM, Mark Lyon holds the main mass.
I have not studied Northwest Africa 15373.
Meteoritical Bulletin Database